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Make rustc thread safe when queries can be used #46596

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Zoxc opened this issue Dec 9, 2017 · 1 comment
Closed
3 of 16 tasks

Make rustc thread safe when queries can be used #46596

Zoxc opened this issue Dec 9, 2017 · 1 comment
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@Zoxc
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C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@Zoxc
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Zoxc commented Dec 9, 2017 •
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This is just an issue noting down the things required to make rustc thread safe when queries can be used.

  • Make GlobalCtxt implement Sync
  • Use scoped thread locals instead of globals, WIP: Less globals #46193
  • Misc fixes required to use a rayon thread pool, WIP: Parallelize passes using rayon #46564
  • Ensure metadata loaded by LlvmMetadataLoader does not get freed on the wrong thread
  • CurrentDepGraph.task_stack has to be made a QueryJob field.
  • ParseSess.included_mod_stack might be problematic
  • Check that optimization fuel is not used with parallel queries
  • Ensure that the err_count() API is not used to discover if errors happen in parallel code
  • Find a way to order error messages deterministically so that if a query depends on another query, its error messages appear after the other query
  • Make mk_attr_id use a scoped thread local or make it part of ParseSess
  • See if we can get rid of locks on TransitiveRelation once old borrowck is gone
  • Review libproc_macro for issues, Find out which types should be Send, Sync. Deal with Deref impls for Symbol.
  • Run CI with cfg(parallel_queries)
  • Refactor away CStore::next_crate_num
  • Refactor away FileMap.external_src, FileMap.lines, FileMap.multibyte_chars, and FileMap.non_narrow_chars
  • When executing queries, instead of keeping around a lock to the query map, create a job object immediately instead
@Zoxc Zoxc self-assigned this Dec 9, 2017
@kennytm kennytm added C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Dec 12, 2017
@Zoxc Zoxc mentioned this issue Mar 2, 2018
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@nikomatsakis nikomatsakis mentioned this issue Mar 2, 2018
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@Zoxc Zoxc mentioned this issue Mar 14, 2018
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@michaelwoerister
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Copied the items from this issue into #48685.

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